Facebook-Events-iCal-Converter/lib/services/ldjson-parser.js

83 lines
2.0 KiB
JavaScript

const cheerio = require('cheerio')
const dayjs = require('dayjs')
const { parseDates } = require('../parser-utils')
const parseEventData = (eventData) => {
const startDate = eventData.startDate ?
dayjs(eventData.startDate) :
dayjs(new Date())
const endDate = eventData.endDate && dayjs(eventData.endDate)
const { start, duration } = parseDates(startDate, endDate)
const { location } = eventData || {}
const { address } = location || {}
const locationName = location ? location.name : ''
const addressStr = address ? [
address.streetAddress || '',
address.addressLocality || '',
address.postalCode || '',
address.addressCountry || '',
].join(' ') : ''
const locationStr = [
locationName,
addressStr,
].join(' ')
const cleanedLocationStr = locationStr.trim().replace(/\r?\n|\r/g, ' ')
const title = eventData.name || ''
const url = eventData.url || ''
const description = eventData.description || ''
return {
start,
duration,
location: cleanedLocationStr,
title,
url,
description,
}
}
const parseUsingLDJSONData = (html, { logger }) => {
if (logger) {
logger.log({
message: 'Parsing using LDJSON parser',
level: 'info',
service: 'parser',
})
}
// NOTE: Mobile web should have serialized
// event info in one of the script tags
const $ = cheerio.load(html)
const $scripts = $('head script[type="application/ld+json"]')
const rawData = $scripts.toArray().reduce((data, node) => {
const firstNode = node.children[0]
if (!firstNode || !firstNode.data) {
return data
}
// NOTE: Handle prefix
if (firstNode.data.startsWith('//<![CDATA')) {
return firstNode.data.slice(12, -5)
}
if (firstNode.data) {
return firstNode.data.trim()
}
return data
}, null)
if (!rawData) {
return null
}
const eventData = JSON.parse(rawData)
const data = parseEventData(eventData)
return data
}
module.exports = parseUsingLDJSONData